Mark Chalfant was 19 when he was shot and killed on June 4, 2014, in the parking lot of a Taco Bell on South Tower Road in Aurora, Colorado. He had arranged to meet three teenagers to sell a small amount of marijuana for $180. An altercation broke out during the meeting and Chalfant was shot; he was taken to a hospital and died of his injuries.

Investigators concluded the meeting was a pre-planned robbery rather than a random attack. The three teens identified in court documents were 18-year-old Calvin Banks, 17-year-old Sterling Hook (also reported as Sterling Dillon Hook), and 16-year-old Vincent Rucker. Police found a gun and a bag of marijuana in Chalfant’s vehicle. The three fled on foot but were arrested within weeks; all three were charged as adults with first-degree murder. Hook later pleaded guilty to second-degree murder and in October 2015 was sentenced to 30 years; Banks pleaded guilty to aggravated robbery and received a seven-year sentence in the Youthful Offender System. A fourth teenager was arrested in connection with the case nearly a year later.

Does anyone have information about Mark’s activities that night or the people involved in the meeting?